Coal-cutting machine.



E. JONES a J. HALL.l

GOAL CUTTING MAGHINB.

Patented July 13, 1909.

UNITED VSTATES PATET OFFICE.,

EBENEZER JONES, OF MARTINS FERRY, AND JOHN HALL, OF MAYNARD, OHIO.

COAL-CUTTING MACHINE.

Specicatonof Letters Patent.

Patented July 13, 1909.

Application filed September 17, 1908. Serial No. 453,434.

To all 'whom it may concern:

Be it known that we, EBENEZER JONES and JOHNHALL, citizens of theUnited States, residing, respectively, at Martins Ferry and `lilaynard, in the county of Belmont and State of Ohio, have invented a certain new and useful Improvement in Coal-Cutting Machines, of which the following is aspecification.

- frame; Fig. 2 is a detail view'on a scale,4

This invention relates more particularly to that class of coal mining machines known variously as undercutting chain breast or long wall machines.

The object of the invention is to simplify and cheapen the construction, to make it more reliable and durable in use, and less liable to derangement, to render its repair more expeditious and less costly than those at present in use.

The invention is embodied chiefly, first, in im roved means for articulating cutter bit ho ding blocks; second, improved means for facilitating the ad dition of links or bit blocks to or their removal from a cutter chain while on its supporting frame, and, third, in an improved form of bit holding block, or as herein shown, described and claimed, the invention not being confined in its practical embodiment to precisely the forms of parts shown.

In the accompanying drawings illustrating said embodiment of the invention-Figure 1 is a plan view with a ortion of the cutting chain removed from t 1e sliding or carrying larger than in Fig. 1, of the outer or cutting edge of the chain; Fig. 3 is a cross section on the line r11-, Fig. 1, through the chain and guide showing that section of the chainv guide where the outer portion is made removable to permit the removal of cutter bit holding blocks and links'; Fig. 4 is'a section on the line y-y, Fig. 2, through a cutter bit holding 4block taken lon itudinally with reference to the chain and s owing in full view ortions of links. Fig. 5 is an edge view o' a link. Fig. 'is a cross section of the cutter head on the line z-e, Fig. 1l Fig. 7 is a cross section 'of the chain guide showing an auxiliary i composed of a casting 9 to which is bolted the corresponding chain guide 1. The chain guide 1 has a base 1ll and a head A1b with an intermediate web 1 c. It is therefore shaped in cross section somewhat like an ordinary railroad rail or lli-beam, the base of the guide at the head of the sliding frame being securedto the head by bolts and nuts as seen at 9a. The base of the guide at the head is made with` a tongue 9b that fits in a corresponding groove `in the head, said tongue aidingin strengthening the connection be- =tween the head and guide. lt will be observed that viewed without the base or inner portion of the lsbeam the guide is oft-form.

7 designates the back end or apex casting, of the sliding frame, and the side chain guides are secured to tongues on the apex and base castings, 7 and 9 respectively, by bolts and nuts as illustrated at 10. The side chain guides are of substantially the same form in cross section as the chain guides at the head of the sliding frame.- The side chain guides A are each made in two principal parts divided at 11, the contiguous ends being provided with slotted lapping tongues 5 held together in adjusted position by bolts as seen at 5a.

The side chain guides spring alittle when the parts of the sliding frame are adjusted from .or toward/each other and with respect to the normal position, and the guides are thus kept in. substantial alinement. .The frame is vshown to be braced vin the perpendicular of the triangle by T-bars 12- ixedly secured by bolts 12a to thefforward or base. piece 9, said bars being adjustably secured by bolts 12b to slotted tongues 7a on the apex piece 7. A Section 1bb ofthe head )ortion of -a side guide can be made removab e by means of a 'set screw 1c (see Fi 3), or several of them so that cut-ter bit b ocks can be removed from or added to cutter chain.

` The cutter bit block is, generally speaking,

of U-form in cross section, but with aterally rojecting outer corners as seen at 2i. The bit block straddles the outer portion of the guides and each leg y2 of the block is formed with an upwardly projecting thickening boss 2a and with two ears 2b, the latter being provided with perforations or bearings 2. The outer or leg-connecting portion of held from running 0E the the block has rounded edges, as seen at 2q, (see Fig. 4). The blocks are connected together to form a chain by straps or lmks 3, (see Fig. 5), each having pins 3a that enter the perforation of bearing 2C, of the ear 2b, and each link has a boss or thickened portion 3b near its middle. The links 3 lie between the legs and the web of the guide and they and the bosses 2a travel in the cavities at the sides of the chain guides and the blocks are ides by the links, and by the bosses 2a also 1f desired. In case the cutters are worn down the laterally projecting outer corners 2il insure a cut wider than the thickness of the sliding frame and therefore freedom of movement of the frame in the cut or kerf.

4 designates the sprocket wheels suitably j ournaled in the castlngs at the corners ofthe frame. The sprockets of these wheels are adapted to project between the outer or legconnecting portions of the blocks and bear a ainst the rounded edges of said portions. TIles'e sprocket wheels also having lateral shoulders 4l1 on which the legs of the cutter holding blocks and the links run as the chain passes around the corners of the frame. The castin s at the corners are shown as so forme that the shoulders 4a of the sprocket wheels, roject somewhat beyond the castin s as s own, so that the said legs and links W1 castings. Friction in operating the chain is thereby lessened and the castings and parts saved from wear. The sprocket wheels can also be cupped as seen at 4b at their u per sides to receive a lubricant and channe s 4 provided from the cu to the bearings. .The characters 2d, 2, an 2f respectively designate pairs of cutter bits in three successive blocks. The bits in each pair can be arranged at raduated distances apart.

The bits of the rstpair in the series of three being farthest apart, and the last the least separated. This articular arrangement of bits romotes the isintegration of the coal lying inthe pathof the teeth and steadies the o eration of the chain, one row balancing t e other. As is more customa a single bit 1can be secured in each block, i desired. Thev bits are removable and are 'secured by set screws 2g as usual. The shank of the bit is secured to stand at an incline to the direction of its ath andthe block back ofthe `bit is brace by an extension 2h. at the rear or apex of the frame is the driving sprocket, and to retain andsteady the chain as it comes from thissprocket we provide a sheetmetal guide 8 secured at one edge by bolts 8a to the apex ,castingand having the other portion reaching out and'around to a line beyond the pathof the teeth or one row of the teeth, as seen in Figs. 1 and 7.

' Among numerous advantages of our construction are that the chain is securely held run on the shoulders and not on the The sprocket.'

in its path, it has large bearin surfaces, can be economically and quic y ,repa1red,

and there is no liability of the sliding frame to stick in the kerf made.

What we claim and desire to secure by Letters Patent is:

l. In a cuttin mechanism for mining ma- I chines, the com ination with a frame provided with a suitable guide, of a cutting chain to travel on said guide comprising bit blocks of U-form and links connecting the legs of said blocks, said links lying between the guide and the said legs.

2. In a -cuttin mechanism for mining machines, the comination with a frame provided with a guide having a T-shaped outer portion, of a cutting chain to travel on said guide comprising bit blocks, of U-form having their legs provided with bearings, and links provided with outwardly rejecting pins or studs connecting the bloc by engagement of said pins or studs with said bearings, said links lying between the web of the guide and the le s of the bit blocks.

.3. a cutting mechanism for mining machines, the combination with'a frame or cutter head and cutting chain support or guide thereon, of a cutting chain comprising cutterbit holding blocks having their opposite sides'4 yat their outer portions 1projectm laterally beyondthe horizontal p anes of t e sides of the chain support and formed with angular" links conned between the web of said guide and the said legs and connecting said blocks.

5. In a cuttin mechanism for mining machines, the com ination of a sliding frame provided With"a chain guide having an outer portion of T-form in cross section, a cutting chain to travel thereon including bit holding blocks of U-form having their legs provided with perforations constituting bearlngs and 1. links provided with pins to engage said perforations to connectI said4 bloc said links -being confined between the web of s'aid guide and the legs of the bit blocks, a portion of the guide being removable to permit the putting on and taking 0H from the guide ofthe blocks and their connecting links.

6. In a cutting mechanism for mining maination'of a sliding rame v chines, the combination of a cutter chain I supportin frame and a suitable guide thereon upon w 1ch the cutter chain travels, and a cutter' chain on said guide including cutter holding blocks provided with suitable is provided in ease the bits in said blocks are seats for removable cutter bits, said cutter Worn oil.

bit holding blocks having their o poste EBENEZER JONES; 'sides projecting beyond Jche horizonte planes JOHN HALL.

5 of the'corresponding sides of both the guide Witnesses to both signatures:

A and frame, whereby a clearance in the kerl R. DELBRIDGE,

for said frame and guide in rear of said blocks JOHN DVoRoCEK. 

